Temperature is given as 1.9399 x 104 Pa, 3.1194 x 10-1 kg/m3, and 216.66 K, respectively. Using these values, calculate the standard atmospheric values of pressure, density and temperature at an altitude of 18 km.

Temperature is given as 1.9399 x 104 Pa, 3.1194 x 10-1 kg/m3, and 216.66 K, respectively. Using these values, calculate the standard atmospheric values of pressure, density and temperature at an altitude of 18 km.